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JavaScript

Once relegated to the browser as one of the 3 core technologies of the web, JavaScript can now be found almost anywhere you find code. JavaScript developers move fast and push software development forward; they can be as opinionated as the frameworks they use, so let's keep it clean here and make it a place to learn from each other!

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One Month After the Hackathon: Why My 4-Service App Stopped Working (and What @mansio Caught in the Verifiers)

Details subtle auth bugs and community PR fixes

One Month After the Hackathon: Why My 4-Service App Stopped Working (and What @mansio Caught in the Verifiers)

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6 min read
TC39 `using` Declarations Land in V8 13: What Node.js 24 Developers Get for Free Without TypeScript

TC39 `using` Declarations Land in V8 13: What Node.js 24 Developers Get for Free Without TypeScript

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11 min read
Build an Offline AI Study App with Local Models (Liquid AI LFM3-1.7B)

Build an Offline AI Study App with Local Models (Liquid AI LFM3-1.7B)

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7 min read
How I Built Lazarus: Autonomous Legacy Resurrection with Kiro Specs, Custom MCP, and Differential Fuzzing

How I Built Lazarus: Autonomous Legacy Resurrection with Kiro Specs, Custom MCP, and Differential Fuzzing

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2 min read
The last 20% of an AI-built app: nine things that actually block launch

The last 20% of an AI-built app: nine things that actually block launch

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5 min read
My PDF parser failed on the first two calls of every fresh process. My error dashboard showed zero.

My PDF parser failed on the first two calls of every fresh process. My error dashboard showed zero.

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3 min read
A repair shop can't print a price. Model the floor and the scope instead.

A repair shop can't print a price. Model the floor and the scope instead.

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8 min read
Half of all café Wi-Fi QR signs fail on the string, not the printing. Here is the WIFI: URI, five traps, and the A4 four-up that carries it.

Half of all café Wi-Fi QR signs fail on the string, not the printing. Here is the WIFI: URI, five traps, and the A4 four-up that carries it.

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10 min read
A shop's price list is a data record, not a design. Render it — and never reprint the QR code.

A shop's price list is a data record, not a design. Render it — and never reprint the QR code.

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11 min read
Selling 59-cent AI video clips without inventing a currency (a wallet on Cloudflare D1)

Selling 59-cent AI video clips without inventing a currency (a wallet on Cloudflare D1)

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4 min read
I made a small browser tool to shrink chat photos and remove metadata

I made a small browser tool to shrink chat photos and remove metadata

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4 min read
How I cut 130 KB from every page by lazy-loading one library

How I cut 130 KB from every page by lazy-loading one library

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2 min read
One HTML page, no network requests: how our browser games ship

One HTML page, no network requests: how our browser games ship

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3 min read
Half of Googlebot's requests to my Next.js site are for JavaScript. 176 pages were never crawled.

Half of Googlebot's requests to my Next.js site are for JavaScript. 176 pages were never crawled.

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3 min read
How I Built a Real-Time Kitchen Display System (KDS) & Zero-Commission QR Dining SaaS with <50ms Sync (Without Heavy Frameworks)

How I Built a Real-Time Kitchen Display System (KDS) & Zero-Commission QR Dining SaaS with <50ms Sync (Without Heavy Frameworks)

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4 min read
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